Hi Frank, I use a similar function that combines partition-by and partition-all:
(defn partition-when [f coll] (map (partial apply concat) (partition-all 2 (partition-by f coll)))) Martin. On Wed, Mar 4, 2015 at 10:19 PM, Ivan L <ivan.laza...@gmail.com> wrote: > I went though almost the exact same exercise and my code is almost > identical to yours. I called it partition-every and I use it a lot. A > more determined individual might submit this for inclusion into core! > > > On Tuesday, March 3, 2015 at 2:46:29 PM UTC-5, Frank wrote: >> >> Hi all, >> >> for some tests I need a function which starts a new partition each time a >> predicate returns true, for instance: >> >> (partition-when >> (fn [s] (.startsWith s ">>")) >> [">> 1" "2" "3" ">> 4" "5" "6"]) >> :=> [[">> 1" "2" "3"] [">> 4" "5" "6"]] >> >> Since I haven't found a built-in function, I copied, pasted, and modified >> the core function partition-by: >> >> (defn partition-when >> [f coll] >> (lazy-seq >> (when-let [s (seq coll)] >> (let [fst (first s) >> run (cons fst (take-while #(not (f %)) (next s)))] >> (cons run (partition-when f (seq (drop (count run) s)))))))) >> >> Is there a better (more idiomatic) way to achieve the same result? >> >> Thank you in advance. >> >> Frank >> > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
